Thanks Genghis.
So as I read your quotes, the designer chooses the limitations which must be placarded. The minimum weight chosen (and placarded) can not be greather than 55Kg but could be zero. The maximum weight chosen must be at least 86Kg but could be more. It is all up to the designer who could design and aircraft that could be operated with 1 50Kg pilot or 2 100Kg pilots provided that was determined during the design and testing and the limits were placarded and the overal microlight limitations were acheived.
Isn't the microlight supposed to be a simple aircraft!
Thanks again.
Regards,
DFC